<!doctype html>
<html>
<head>
    <meta charset="utf-8">
    <title>Globe Layers - ECHARTS-GL</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
    <meta name="apple-mobile-web-app-capable" content="yes"> <!-- Fullscreen Landscape on iOS -->
    <link rel="stylesheet" href="./common.css">
</head>
<body>
<div id="main"></div>
<div id="toolbar">
    <button id="add-cloud">Add Cloud</button>
    <button id="add-echarts-map">Add ECharts Map</button>
    <button id="switch-shading">Switch Shading</button>
</div>
<script src="../node_modules/echarts/dist/echarts.js"></script>
<script src="../dist/echarts-gl.js"></script>
<script src="lib/jquery.min.js"></script>
<script src="js/commonUI.js"></script>
<script>
    var chart = echarts.init(document.getElementById('main'));

    // http://visibleearth.nasa.gov/view_cat.php?categoryID=1484
    chart.setOption({
        globe: {
            baseTexture: 'asset/world.topo.bathy.200401.jpg',
            heightTexture: 'asset/elev_bump_4k.jpg',

            displacementScale: 0.1,

            shading: 'lambert',

            light: {
                ambient: {
                    intensity: 0.1
                },
                main: {
                    intensity: 2
                }
            },
            viewControl: {
                autoRotate: false
            },

            layers: []
        },
        series: []
    });

    var shading = 'lambert';
    var cloudAdded = false;
    $('#add-cloud').click(function () {
        cloudAdded = true;
        chart.setOption({
            globe: {
                layers: [{
                    name: 'cloud',
                    texture: 'asset/clouds.png',
                    shading: shading,
                    distance: 10
                }]
            }
        });
    });
    $('#switch-shading').click(function () {
        if (!cloudAdded) {
            return;
        }
        shading = shading === 'lambert' ? 'color' : 'lambert';
        chart.setOption({
            globe: {
                layers: [{
                    name: 'cloud',
                    shading: shading
                }]
            }
        });
    });

    window.addEventListener('resize', function () {
        chart.resize();
    });

</script>
</body>
</html>
